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Method for optimized color control in a printing machine

a printing machine and color control technology, applied in the field of color control in the printing operation, can solve the problems of high labor intensity, high cost, and high accumulation of individual sampling points, and achieve the effect of reducing labor intensity

Active Publication Date: 2018-09-27
HEIDELBERGER DRUCKMASCHINEN AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The invention is a method for controlling color in a printing machine. The new method optimizes color control and reduces resource usage. It involves creating a smaller test chart with fewer color patches, which saves time and effort. This is achieved by using a reduced ICC table that contains fewer sampling points.

Problems solved by technology

In particular when more than four colors are involved in a multicolor printing operation, these unnecessary sampling points make the color transformation extremely complex and time-consuming.
This results in a great accumulation of individual sampling points in the grid of the process color space.

Method used

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  • Method for optimized color control in a printing machine
  • Method for optimized color control in a printing machine
  • Method for optimized color control in a printing machine

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Embodiment Construction

[0042]Referring now in detail to the figures of the drawings, in which identical reference symbols identify mutually corresponding elements, and first, particularly, to FIG. 1 thereof, there is seen a block diagram of a printing machine system 2, on which the method of the invention is preferably implemented. In addition to an inkjet printing machine 3 itself, the system is formed of an inkjet printing machine control unit 4 on which ICC profiles 6 to be corrected are saved in a database 5. Apart from the control unit 4 of the printing machine 3, any other computer that allows an operator 1 to access the color management of the printing operation may be used.

[0043]The preferred embodiment of the method of the invention has a number of requirements:

[0044]It is to take up much less memory space than the current ICC profiles 6. It is to be able to reduce information where it is redundant in a perception-adapted way. Moreover, it is to be able to reduce information where it is irrelevan...

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Abstract

A method for printing on a printing machine with color space transformation using tables formed of n-dimensional orthogonal grids includes printing and colorimetrically measuring a test chart in a target color space providing measured values corresponding to sampling points in the color space, interpolating between the sampling points to determine further sampling points, and using existing sampling points to create an ICC table for color space transformation between target and process color spaces. A computer isolates combinations of n−1-dimensional partial grids for process color combinations from grids of the table in the process color space. Partial grids are converted into two-dimensional segments. Sampling points of segments are modified, removing nonrequired sampling points and distributing sampling points in the partial grid. The partial grids are reintegrated into the grid and color management of the printing operation and the printing operation using the reduced ICC table occurs.

Description

CROSS-REFERENCE TO RELATED APPLICATION[0001]This application claims the benefit, under 35 U.S.C. § 119, of German Patent Application DE 10 2017 204 787.9, filed Mar. 22, 2017; the prior application is herewith incorporated by reference in its entirety.BACKGROUND OF THE INVENTIONField of the Invention[0002]The present invention relates to a method for optimized color administration to carry out a printing operation in a printing machine.[0003]The technical field of the present invention is the field of color control in a printing operation.[0004]A simulation of multicolor printing operations is important especially if the intention is to find out if and to what degree of accuracy predefined spot colors such as Pantone colors may be reproduced in a printing operation. Printing machines, in particular inkjet printing machines, require special inks that are specifically suitable for the purpose, not just any type of printing ink. Thus, in most cases, spot colors need to be reproduced by...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): H04N1/60G06F17/17
CPCH04N1/6019G06F17/175B41F33/00H04N1/6033
Inventor SIEGERITZ, HELMUT
Owner HEIDELBERGER DRUCKMASCHINEN AG
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